Cape bytes problem

I need help on putting a cape to a player. When I try, it gives me internal server error and it says that the especific bytes have to be 8192. I dont know what to do

 

Hello there!
Please send your code and the full error so we can help you.

 

No, it will not be fun. You have to guess. And I sincerely believe that this is the best technique to achieve the best help I can get.

this is not the worst case, he did give us an error message

 

so we should just guess like magical gods what his code it and what he is doing wrong?
Or just provide him with the full code lmao

 

Your Cape Texture should be 64x32 (probably)

 

yea but i think his code was doing wrong (my grammar is not so good :<)